How do I let those I love most of all...know that I am gay?

I'm gay, and I've admitted it to a couple people being 2 friends and my sister. But how can I ever possiblly tell my father or mother than I am gay when I know it will simply break my mother's heart and my father has such a biased opinion toward's gay people that it seem's it would be impossible for him to ever understand. My father believe's that all gay people fall under the same steriotype of having a lisp and crossdressing and saying they have a woman stuck inside of them. I don't believe this...I'm gay and I act just like every other guy! I mean I'm a guy and I am exactally the same as a straight guy except I like other guys...that doesn't mean I have to act like a girl now :P But my father already made it clear that the worst possible thing a son could ever do to their father is to turn gay. How can I ever come out to my parents...it's very important that I do eventually because I can't remain single or hidden forever :(